Aspirating device



lVlay 7, 1929. s, E E 1,712,425

ASPIRATING DEVICE Fil ed Dec. 14, 1927 HE 1e 5. K /9 W mvzmgi s ATTORNEY l 'atented May 7, 1929.

HENRY S. EARNEST, OF DETB OIT, MICHIGAN.

ASPIRATING DEVICE.

Application filed December 14, 1927. Serial No. 240,010.

This invention relatesto vacuum or suction creating fluid pressure devices as exempllfied by so-called vacuum cleaners,, sprayer-s and the like, falling within the class of aspirat ors, and has for its object the provision of eflicient suction or vacuui'n creating means of simple, relatively inexpensive construction, possessing in addition to novel combinations, constructions and arrangements of parts, particular advantages as a vacuum or suction cleaner.

The invention, while applicable in principle as a vacuum or suction creating fluid pressure device of general character such as described, will be exemplified and described as a vacuum or suction cleaning device as representing a particularly advantageous embodiment. It consists in the combinations, constructions and arrangements herein de scribed and claimed, and is more fully described in the following detailed specification, which is to be read in connection with the accompanying drawings forming part thereof, and in which:

Figure 1 is a longitudinal vertical sectional view through the casing of a portable vacuum or suction cleaner embodying the invention.

Figure 2 is an elevation thereof on a reduced scale.

Figure 3 is a horizontal section through theupper discharge chamber, 3-3 of Figure 1.

Figure 4 is a horizontal section through the upper portion of the pressure chamber, taken on line 4-4 of Figure 1.

Figure 5 is a detail of a modified form of suction nozzle.

Figure 6 is a detail of a modified form of discharge receptacle.

In carrying out the invention, provision is made of a tubular casing partitioned to provide an outer annular fluid pressure receiving chamber and an inner pressure discharging chamber which houses an aspirating tube, the discharge end of which extends through the easing into a discharge receptacle associated with the casing, a suction tube being introduced into the casing and positioned in cooperative relation to the aspirating tube. Conveniently,this casing is formed by an inner tubular section 1 having an end head 2 extending beyond its tubular section 1 to rest upon and cover the open end of an outer tubular section 3 whose opposite end is provided with a head 4: which may be threaded or otherwise secured thereon. The diameters of taken on the line the inner and outer tubular sections 1 and 3 as to provide between are of such difference these tubular portions, when assembled in concentric relation, an annular fluid pressure receiving chamber 5. Fluid under pressure is admitted to this chamber through a suitable conduit 6 threading into an internally threaded boss 7 formed upon the outer tubular section 3. Preferably, this conduit is in the form of a length of metal pipe which may, conveniently, constitute a handle, although additional carrying means may be provided if desired.

The head or end 2 of the inner tubular section 1 may be clamped upon the open end of the outer tubular section in any appropriate manner. Conveniently, the lower end of a discharge receptacle 8, associated with the casing, is provided with an enlargement forming an internally threaded annular flange 9 edged by an annular shoulder 10 overlying the open end of the outer tubular section 3, the threaded flange 9 engaging the externally threaded upper end 11 of said tubular section causingthe shoulder 10 to bear against and clamp the head 2 against said open end. The discharge receptacle 8, as shown in Figure 1, may be in the form of a length of tubing of brass or other suitable material having a hinged upper end 12 detachably latched at 13 and formed with a series of perforations therein for the escape of air discharged in the receptacle.

The inner tubular section 1 of the casing may be integral with or permanently united to its head 2 as by welding. Vith its head, it carries an aspirating tube 14, the upper end of which extends through the head 2 and into the discharge receptacle 8. 'As shown, the discharge end 15 of the aspirating tube is offset and formed with a return bend at its .upper end to discharge fluid under pressure and matter collected by the suction means hereinafter described, downwardly into the receptacle 8.

The other and intake end of the aspirating tube is outwardly tapered to provide a conical portion 16 which abuts the lower head 4 of the casing and is appropriately joined to the lower end of the inner tubular section 1 as by welding or soldering. This tubular section 1, as shown, is joined to the conical portion 16 at a point slightly above its lower edge and this conical intake end of the aspirating tube is placed in communication with the annular pressure receiving chamber 5 by means of an annular series of ports 17 in the form of notches formed in its lower edge. Fluid under pressure which may be in the form of compressed air will therefore enter the annular chamber and through the ports '17 enter the lower end of the aspirating tube.

A suction tube 18 has one end exteriorly of the casing provided with a suction mouth 19 and has its other end extended into the lower end of the casing through the head 4 with its upper edge outwardly flared as shown and positioned closel adjacent to the inner face of the conical portion 16 adjacent to its narrowed upper end, providing a narrow annular fluid jet or passageway at the upper end ofthe suction tube'by means of j which an annular converging jet of fluid uncharge receptacle 8. The outwardly flared upper end of thesuction tube serves to direct the pressure fluid flowing up its sides into the annular discharge jet and permits the use of a suction tube of smaller diameter than would otherwise be necessary to cooperate with the conical intake end of the aspirating tube. The annular fluid pressure receiving chamber 5 is of relatively small cross section to prevent unnecessary loss of pressure and the conical intakeend of the aspirating tube,

- being in direct ported communication with this annular chamber, receives the fluid therefrom without any substantial reduction in pressure and directs it upwardly into the the mouth 19 of the suction tube.

conver ing passage formed between the suction tu e 18 and the cone 16 into the narrow annular discharge jet between the edge of the upper end of the suction tube and the closely adjacent internal face of the upper end of the cone 16 so that a convergingv annular jet of intense pressure meets at a point just above the upper end of the suction tube and creates a strong vacuum inducing strong suction at Such an aspirating device as described is of particularadvantage whenusedas a cleaning tool or so called vacuum cleaner for factory establishments, since compressed air lines are usually available for connection to the fluid pressure conduit or pipe 6 of the device. The dust, dirt, sand, bolts and metal drawn up through the mouth 19 of the suction tube can do no harm to the device, since there are no moving parts to bebroken or clogged and the discharged matter is readily removed from the receptacle 8 at the upper end of the device by means of its hinged cover- 12. The separability of the inner and outer tubular sections of the pressure casing is advantageous in the assembly of the parts, and facilitates disassembly and inspection or replacement when necessary. The aspirating tube 14 is rigidly secured to the head 2 as by soldering so that the head is made air tight at this point and the aspirating tube with its cone and the inner tubular sections 1 and 2 may be removed from the device as a unit, and may be assembled as a unit for installation in manufacture.

The suction tube 18, as shown in Figures 1 and 2, is provided with an outwardly tapering suction mouth having its lower edges in the same plane. As shown in Figure 5, a suction mouth 20 having corrugated edges 21 which are more effective for use in connection with cleaning the ribbed surface of flooring and other structural work. The receptacle 8, as shown in Figures 1 and 2 is in the form of a metal tube or cylinder. The form of the receptacle may, of course, be varied, depending upon the use to which the device is put. As shown in Figure (3, a fabric bag or receptacle 22 may be employed in substitution for the metal tubing 8, the lower edge of the fabric being clamped by the shoulder 10 of an annular clamping ring 9" internally threaded to engage the exteriorly threaded upper end of the outer tubular section 3.

he operation of the device will be obvious from the preceding description and need not be recapitulatcd. The invention is, as heretofore stated, applicable in spirit to different uses while of particular utility in the specific form disclosed when employed as a suction cleaner. This form, however, is intended as illustrative rather than restrictive and structural changes and adaptations are contemplated in consonance with the spirit of the invention and the scope of the appended claims.

What I claim therefore, and desire to secure by Letters Patent is:

1. An aspirating device comprising concentric tubular casings having closing heads at their upper and lower ends providing an outer annular fluid pressure receiving chamher and a closed inner chamber, an aspirating tube within said inner chamber having a discharge end extended through the upper headed end thereof and having its other and intake end tapered outwardly and seated against the chamber wall above its lower headed end with the wall of said inner chamber therebelow ported into communication with the interior of the enclosin annular pressure chamber, and a suction tube extended into said inner chamber and supported within the tapered end of the aspirating tube with its end flaring outwardly and positioned closely adjacent to the inner face of said tapered portion at its narrowed end to provide a restricted fluid passage thercbetwecn.

2. An aspirating device comprising a closed tubular casing housing an aspirating tube with its discharge end extended through one end of said casing and with its intake Ill! end outwardly tapered and housed within the casing and engaging the casing Wall above the other end of the casing, means porting the end of said casing below said outwardly tapered end in communication with fluid under pressure, and a suction tube having one end extended through said other end of the casing and positioned within the tapered intake end of the aspirating tube adjacent to its narrowed upper end to provide a narrow converging fluid pressure jet directed into said intake end of the aspirating tube at the end or the suction tube. a

An aspirating device comprising a tubular closed casing partitioned to provide an annular outer fluid pressure receiving chamher and a closed inner pressure discharging chamber, a discharge receiving receptacle associated with said casing, an aspirating tube within said inner pressure discharging chainher having its discharge end extended through one end of said casing and into said receptacle and having its other and intake end housed within said inner chamber and outwardly tapered to engage the wall of said inner chamber above its other end, said wall iiliGlt-El'JBlOW being in ported communication with the enclosing pressure receiving chamber of said casing, and a suction tube having a suction mouth at one end exteriorly of said casing and lliLX lllfl its other end extended through and into said closed inner chamber and positioned within the tapering intake end of the aspirating tube closely adjacent to the narrowed upper end thereof.

l. An aspirating device comprising a ti'ibular closed casing partitioned to provide an annular outer fluid pressure receiving chamber of restricted cross-sectional area and a closed inner pressure discharging chamber, a discharge receiving receptacle associated with said casing, an aspirating tube within the inner chamber of said casing with its discharge end extended through said inner chamber and into said receptacle and with its other and intake end housed within the inner chamber and outwardly tapered and in ported communication with the outer pressure receiving chamber, and a suction tube having a suction mouth at one end exteriorly of the casing and having its other end extended through and into the inner chamber of said casing and positioned with its end within the outwardly tapered intr e end of the aspirating tube closely adjacent to the narrowed upper end thereof.

5. An aspirating device comprising a tubular closed casing partitioned to provide an outer fluid pressure receiving chamber of restricted cross-sectional area and a closed inner chamber, a discharge receiving receptacle associated with said casing, an aspirating tube within said inner chamber and inclosed by said annular outer chamber having a discharge end extended through said inner mouth at one end exteriorly of the casing and having its other end extended through and into said casing and positioned within the conical intake end of the aspirating tube closely adjacent to the narrowed upper end thereof.

6. An aspirating device comprising a closed casing formed of complementary telescoped tubular sections of different diameters having end closing heads and providing an outer annular fluid pressure receiving chamber oi restricted cross sectional area and a closed inner pressure discharging chamber, an aspirating tube within the inner chamber with its discharge end projecting through the headed. upper end thereof and with its other an d intake end housed within the closed inner chamber and outwardly tapered to form a conical portion engaging the wall of said inner chamber above its lower headed end, said wall therebelow being ported into communication wit-h the outer pressure receiving chan'iber, and a suction tube extended through and into said inner chamber and having its end positioned within said conical portion closely adjacent to the walls thereof at its narrowed end.

7. An aspirating device comprising a closed casing formed of complementary telescoped headed tubular sections of different diameters detachably joined in concentric relation providing an outer annular fluid pressure receiving chamber and an inner pressure discharging chamber housing an aspirating tube, the discharge end of said tube being extended through the headed end of one section and its other and intake end being tapered outwardly and seated against the headed end of the other section in ported communication with said outer annular pressure receiving chamber, and a suction tube having one end extended through said last mentioned headed end and positioned within the outwardly tapered intake end of the aspirating tube adjacent to the narrowed ripper end of its tapering portion.

8. An aspirating device comprising a closed casing formed of complementary telescoped headed tubular sections of different diameters detachably joined in con centric relation providing an outer annular fluid pressure receiving chamber and an inner chamber, an aspirating tube housed within said inner chamber having an outwardly tapering intake end permanently joined to the adjacent inner tubular wall of the am nular chamber and having a discharge end extended through and permanently united to the headed end of the tubular section pro viding said inner tubular wall, said aspirating tube and its connected inner tubular section being bodily separable from the other and outer tubular section, and a suction tube having one end permanently united with and extended through the headed end of the said outer tubular sect-ion to position its extremity within the outwardly tapering intake end of the aspirating tube with its edges closely adjacent" to the walls ofthe tapering portion at its narrowed upper end.

9. An aspirating device comprising a closed casing formed of complementary telescoped headedtubular sections of difierent diameters disposed in concentric relation providing an outer annular fluid pressure receiving chamber and an inner chamber with the headed ends of each section engaging and closing the open tubular end of its complementary section and constituting the end Walls of the casing, the open end of one of said tubularsections being externally threaded, a discharge receiving receptacle ha-vi an internally threaded flange engaging sai threaded section end and having an adjacent annular shoulder to engage and clamp the cooperating headed end of the complementary section against the open end of said threaded tubular section, an aspirating tube housed within the inner chamber of the casing having a discharge end extended through one end of the easing into said discharge receptacle and having its other and intake end outwardly tapering and abutting the opposite end of the casing and in ported communication with said annular chamber, and a suction tube having one end provided with a suction mouth and its other end extended into the inner chamber of the casing and positioned within the outwardly tapering intake end of the aspirating tube.

Signed at Detroit in the county of We no and State of Michigan, this 5th day of ceinber A. D. 1927.

HENRY S. EARNEST. 

